From db67c87916a54f1f8a061bca8932e5ae06af4ed4 Mon Sep 17 00:00:00 2001
From: Arpit Jalan <arpit@techapj.com>
Date: Fri, 13 Jul 2018 07:58:27 +0530
Subject: [PATCH] fix purge unactivated users subquery

---
 app/models/user.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/models/user.rb b/app/models/user.rb
index 0168a7b985b..a0022b7db56 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1223,7 +1223,7 @@ class User < ActiveRecord::Base
       .where("created_at < ?", SiteSetting.purge_unactivated_users_grace_period_days.days.ago)
       .where("NOT admin AND NOT moderator")
       .where("NOT EXISTS
-              (SELECT 1 FROM topic_allowed_users tu JOIN topics t ON t.id = tu.topic_id AND t.user_id > 0 WHERE tu.user_id = users.id)
+              (SELECT 1 FROM topic_allowed_users tu JOIN topics t ON t.id = tu.topic_id AND t.user_id > 0 WHERE tu.user_id = users.id LIMIT 1)
             ")
       .limit(200)
       .find_each do |user|